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Crack Tunnelling and Crack Tip Opening Angle in Drop-Weight Tear Test Specimens

  • Letters in Fracture and Micromechanics
  • Published:
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Abstract

Interrupted drop-weight tear tests (DWTT) of typical low-strength and high-strength pipe steels were performed at quasi-static and impact loading rates, to quantitatively characterize crack tunnelling and crack-tip opening angle (CTOA). Crack front tunnelling was observed in all interrupted DWTT specimens, but the extent of tunnelling varied with the steel grade and the loading rate. CTOA values measured optically at the surface were higher than those measured at a cross-section close to mid-thickness. This is attributed to the effect of crack tunnelling, i.e. the effect of constraint, on CTOA. CTOAs derived from load vs. load-line displacement, using the simplified single-specimen method, are in good agreement with values measured at the mid-thickness.

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References

  • Anon (2006) ASTM E2472-06, Standard test method for determination of resistance to stable crack extension under low-constraint conditions, 2006, ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA, 19428-2959 USA.

  • Demofonti G, Buzzichelli G, Venzi S, Kanninen, M (1995) Step by step procedure for the two specimen CTOA test. In: Proc. 2nd International Pipeline Technology Conference, Pipeline Technology, Vol. II, R. Denys ed., Ostend, Belgium, Sept. 11-14, 1995, Elsevier Science, 503-512.

  • Horsley DJ (2003) Background to the use of CTOA for prediction of dynamic ductile fracture arrest in pipelines. Eng Fract Mech 70: 547–552

    Article  Google Scholar 

  • Xu S, Bouchard R, Tyson WR (2007) Simplified single-specimen method for evaluating CTOA. Eng Fract Mech 74: 2459–2464

    Article  Google Scholar 

  • Xu S, Tyson WR (2008) CTOA measurement of pipe steels using DWTT specimen. In: Proc. 7th International Pipeline Conference-IPC 2008, Calgary, AB, Canada, Sept. 29-Oct. 3, 2008, ASME, Paper IPC2008-64060.

  • Xu S, Tyson WR, Bouchard R (2009) Experimental validation of simplified singlespecimen CTOA method for DWTT specimens. In: Proc. 12th International Conference on Fracture (ICF12), Ottawa, ON, Canada, July 12-17, 2009, ICF2009 Paper T35.018.

  • Xu S, Tyson WR, Eagleson R, McCowan CN, Drexler ED, McColskey JD, Darcis Ph P (2010) Measurement of CTOA of pipe steels using MDCB and DWTT specimens. In: Proc. 8th International Pipeline Conference (IPC 2010), Calgary, AB, Canada, Sept. 27 – Oct. 1, 2010, ASME, IPC2010-31076.

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Authors and Affiliations

  1. CANMET-Materials Technology Laboratory, Natural Resources Canada, 568 Booth Street, Ottawa, Ontario, Canada

    S. Xu, R. Eagleson, W. R. Tyson & D.-Y. Park

Authors
  1. S. Xu
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  2. R. Eagleson
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  3. W. R. Tyson
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  4. D.-Y. Park
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Correspondence to S. Xu.

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Xu, S., Eagleson, R., Tyson, W.R. et al. Crack Tunnelling and Crack Tip Opening Angle in Drop-Weight Tear Test Specimens. Int J Fract 172, 105–112 (2011). https://doi.org/10.1007/s10704-011-9635-5

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  • DOI: https://doi.org/10.1007/s10704-011-9635-5

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